Multipolymer micro-nano particles and preparation method thereof

A technology of micro-nano particles and multi-copolymers, which is applied in the field of multi-copolymer micro-nano particles and their preparation, can solve problems such as poor water resistance, and achieve the effects of high preparation efficiency, improved water resistance, and easy recycling and reuse.

Active Publication Date: 2017-12-01
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, although the high polarity and high reactivity of maleic anhydride monomers have greatly expanded its application fields, it is precisely because of the presence of highly reactive hydrophilic polar groups such as anhydrides that maleic anhydride monomers Anhydride copolymers are easily hydrolyzed and have poor water resistance

Method used

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  • Multipolymer micro-nano particles and preparation method thereof
  • Multipolymer micro-nano particles and preparation method thereof
  • Multipolymer micro-nano particles and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1: oil-soluble free radical initiator AIBN 0.025g is dissolved in 22.5g isoamyl acetate, adds St 1.25g, MAH 0.9423g, BA 0.2984g successively in the system (the mol ratio of St, MAH and BA is 5:4:1). After the monomers are dissolved and mixed evenly, the reaction system is ventilated with nitrogen for 30 minutes to remove oxygen; after that, the reaction system is placed in a constant temperature oil bath at 75°C, and the reaction time is set to 8 hours. After centrifugation for 10 min, the resulting copolymer microspheres were separated from the reaction system and dried. The yield of the polymer microspheres was 81%, and the particle diameter of the obtained terpolymer microspheres by scanning electron microscope was 423nm, and the particle size distribution was 1.02, the Tg of the terpolymer measured by DSC is 196°C, and the St:MAH:BA=0.4655:0.4456:0.0888 measured by elemental analysis.

Embodiment 2

[0042] Embodiment 2: oil-soluble radical initiator AIBN 0.025g is dissolved in 22.5g isoamyl acetate, adds St 1.2149g, MAH 0.6869g, BA 0.5981g successively in the system (the mol ratio of St, MAH and BA is 5:3:2). After the monomers are dissolved and mixed evenly, the reaction system is ventilated with nitrogen for 30 minutes to remove oxygen; after that, the reaction system is placed in a constant temperature oil bath at 75°C, and the reaction time is set to 8 hours. After centrifugation for 10min, the copolymer microspheres obtained by the reaction were separated and dried from the reaction system, and the yield of the polymer microspheres was 60%. The particle diameter of the obtained terpolymer microspheres by scanning electron microscope was 389nm, and the particle size distribution was 1.03, the Tg of the terpolymer measured by DSC is 185° C., and the St:MAH:BA=0.4685:0.4208:0.1106 measured by elemental analysis.

Embodiment 3

[0043] Embodiment 3: oil-soluble free radical initiator AIBN 0.025g is dissolved in the mixed solvent of 18.75g isoamyl acetate and 3.75g n-heptane (the mass ratio of isoamyl acetate and n-heptane is 5:1), Add St1.2149g, MAH0.6869g, BA0.5981g to the system in turn (the molar ratio of St, MAH and BA is 5:3:2). After the monomers are dissolved and mixed evenly, the reaction system is ventilated with nitrogen for 30 minutes to remove oxygen; after that, the reaction system is placed in a constant temperature oil bath at 75°C, and the reaction time is set to 8 hours. After centrifugation for 10min, the copolymer microspheres obtained by the reaction were separated and dried from the reaction system, and the polymer microsphere yield was 78%, and the particle diameter of the terpolymer microspheres obtained by the scanning electron microscope was 288nm, and the particle size distribution was 1.01, the Tg of the terpolymer measured by DSC is 178° C., and the St:MAH:BA=0.4545:0.4212:...

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Abstract

The invention discloses multipolymer micro-nano particles and a preparation method thereof. The multipolymer micro-nano particles are prepared from styrene monomers, maleic anhydride monomers and (methyl) acrylate monomers; the multipolymer micro-nano particles are prepared in a self-stabilizing precipitation polymerization manner, and a copolymerization reaction system comprises styrene electron donor monomers, maleic anhydride electron receptor monomers and (methyl) acrylate monomers; narrow-range multipolymer micro-nano particles are separated from the reaction system through centrifugation or filtration after the polymerization reaction ends. The method adopts a simple synthesis route and mild reaction process condition and is safe and convenient to operate, the processability and water resistance of the prepared multipolymer micro-nano particles are significantly improved beside uniform particle size distribution, and the multipolymer micro-nano particles are applicable to industrial production of polymer micro-nano particles.

Description

technical field [0001] The invention relates to multi-component copolymer micro-nano particles and a preparation method thereof. The multi-component copolymer micro-nano particles are composed of styrene monomers, maleic anhydride monomers and (meth)acrylate monomers. The multi-component copolymer micro-nanoparticles are prepared by self-stabilizing precipitation polymerization, and a third monomer is introduced into the charge transfer complex system composed of electron-donating monomers and electron-accepting monomers for polymerization to obtain processability and water resistance. Multi-component copolymer micro-nano particles with excellent performance. Background technique [0002] Maleic anhydride monomer is an important small molecule unsaturated organic acid anhydride. At the same time, because the anhydride group has a strong electron-withdrawing effect, maleic anhydride (MAH) as an electron-accepting monomer can transfer electrons to many electron-donating monome...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F222/08C08F220/18C08F212/12C08F2/06
CPCC08F212/08C08F212/12C08F222/08C08F220/1812C08F220/1804C08F220/1808
Inventor 杨万泰樊蓉陈冬王力马育红
Owner BEIJING UNIV OF CHEM TECH
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